Pneumatic thread remover for looms



Oct. 17, 1950 e. N. PETERSON 2,526,269

PNEUMATIC TI'IREAD REMOVER FOR LOOMS Filed April' 22, 1949 PIW (Iillllllllh INVENTQR GEORGE NIPETERSON.

ATTORNEY i 'atented Oct. 17, 1950 UNITED STATES PATENT QFFICE- PNEUMATIC THREAD iEMOVEitFoit V I LOOMS George N. Peterson, Grafton? Masss-assi ndr to Crornptn-& Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts Application April 22, 1949,"serla1 No. 89,61r'

This invention relatesto improvements in pneumatic thread removers 'more' particularly for the thread of the outgoing bobbin incident to a weft replenishing operation of a loom and it is the general object of the invention to improve the thread pick-up means which" guides the thread toward the mouth of the remover tube.

.In 'a form of pneumatic thread remover which has gone into general usea tube is lowered from a normally raised position to place its intake mouth behind the thread on a weft replenishing beat of the loom. Extending forwardly from a '1 Claims. (01. 139 256) point behind the intake mouth is a pick-up lip which passes under the thread to guide it toward the mouth. A strip of plush extends across the lay into which the Up is embedded when the thread remover is lowered. The thread of the outgoing bobbin lies across the plush and is moved It is an important object of the present in vention to form the lip in such manner that air :may enter directly into the tube without being :required to follow a curved path. In this way :the lint and dirt moves along with the air into :the remover tube and does not collect on the lip for around the mouth. This result may be ac- :cornplished by providing the usual form of lip with one or more openings or perforations placed .so that air can move in more or less-straight lines into the tube without having its velocity and dust carrying capacity reduced.

With these and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein two forms of the invention are shown,

Fig. 1 is a side elevation of a part of a weft replenishing loom having the preferred form of the invention applied thereto, the lay, shuttle and shuttle box, and part of the loom frame being shown in section; a

Fig. 2 is a plan view of the structure shown in Fig. 1,

Fig. 3 is an enlarged detailed vertical section on line 3-3, Fig. 2,

Fig. 4 is airont elevation looking in the direction 'of arrow 4; Fig. 3, the-support for the pneumatic remover tube and part of the lay being shown in cross section,"

Fig. 5 is a' view -'similar to Fig. i but showing a modified form of the invention, and

Fig: 6 is avertical section on line 65, Fig. 5.

Referringparticularly to Figs. land 2, the loom I frame it supports a bracket H on which a weft replenishing'magazine I2 is pivoted-as at l3. The bracket-ll hassecured thereto'a stud M on which a transferrer arm i5 is pivoted. The

transferrer arm is normally in raised position as shown in Fig; Lbut' is lowered by well known means including" a" bunterslli on the lay'L and a latch I? as the lay moves forwardlyon a replenishing beat; I

Pivotedon the stud Mis a-carrier' 2i normally in raised "position-but having an arm 25 which is over hung by a-stud 22 on the transferrer arm.

When the latter descends stud 22 rocks the carrier 28 "downward1yirom-"the normal-full line position shown in Figz'l, and as the'lay approaches its b'ackcenter position after transfer a rod 23 rises to return the carrier to its normal position;

A rod -25 is slideably mounted" on the carrier 20 and is held yieldinglyfin rear position by a spring26f'The rear'part'of rod 2-5 is secured to aplateil which supports a pneumatic thread remover tube 28. "The latter'is connected by a hose 29 to means creating subatmospheric pressures in the tube 28.

The'lay has a shuttlejbox 30 to receive the shuttle S frorn'which-the' weft thread-T extends When the toward the "selvage of thefabric F. shuttle is boxed at the magazine-end of the loom on a replenishing beata cutter (it moves rearwardly through a slot 32 in the front wall of the" shuttle box to cut a thread T'at a'pointadjacent to the shuttle eye E.-

When carrier-Z0 is rocked as described the intake mouth 35 at the bottom of tube 28 moves to a position behind the thread, see Fig. 2. The

E" 1', the *plush'moves the thread In carrying the preferred form of the invention into effect the tube 28 is associated with a form of pick-up lip which will avoid collection of lint and dirt at the mouth 35. To accomplish this result the lip 46 may be made as indicated in Fig. 4. The lip is preferably V-shaped and has right and left sides 4| and 42, respectively, joined by a bottom 43 which may if desired be curved. The lip may in effect be formed as an extension from the rear wall 44 of the plate 21, and has a relatively large opening 45 which is in alignment with axis of tube 23, as will be apparent from Fig. 3. The lip is not necessarily made as shown in Fig. 3, but in any event it will be on the tube 28 and move with it.

With the lip 40 made as described air can rise from a point below the lip and pass upwardly through the opening 45 and enter the mouth 35 without being required to turn a corner or follow a curved path and thus lose its ability to support lint. The mouth 3-5 therefore remains clear and is able to draw in enough air to remove the threads even after being in operation for a considerable length of time. As the lay moves rearwardly after a transfer operation with the lip down in the position shown in Fig. 3 the piles of the plush as will be deflected forwardly to leave an open space 46 under the lip 40 for the entrance of air.

In the modified form of the invention shown in Figs. 5 and 6 the lip 50, instead of having a single relatively large opening, is formed with openings or perforations 5i an arrangement of which is shown in Fig. 5, wher three perforations are shown. These perforations preferably have their sides 52 parallel to the tube 28 or its axis, see Fig. 6, so that air rising from under or behind the lip will be able to pass through the perforations toward the mouth 35 with a minimum of turbulence. When fine yarns are being woven there is less liklihood that their free ends will whip into the perforations 5! than is the case with a single large opening 45. The latter, however, need not be as large as shown in Fig. 4 when very fine wefts are used.

From the foregoing it will be seen that the invention sets forth simple means by which the thread '1 can be directed into the mouth 35 by a forwardly extending lip having formed therein one or more air passages or perforations under the mouth, thereby enabling air to pass into the mouth 35 in more or less straight lines. The two sides 4! and 32 of the lip may conveniently be located in a plane which is transverse of and preferably though not necessarily oblique to the axis of tube 28, and the opening 45 will be large enough to permit a considerabl column of air to be drawn through it into the tube 28. The lip also deflects the piles in front of it to provide a free space 36 directly under the opening 45 or perforations 5 l.

Having thus described the invention it will be seen that changes and modifications of the foregoing specific disclosure may be made without departing from the spirit and scope of the invention.

What is claimed as new is:

1. In a pneumatic thread remover for a thread remaining incident to a weft replenishing operation of a loom, a pneumatic tube in which subatmosphere pressures exist, and a thread pick-up 4 lip on the tube lying in a plane extending across the axis of the tube and provided with an opening therethrough aligned with the tube through which air can pass into the tube.

2. In a pneumatic thread remover for a thread remaining on the lay of a loom incident to a weft replenishing operation of the loom, a pneumatic tube in which subatmospheric pressures exist having a thread intake mouth moved to a position behind the thread incident to the weft replenishing operation, and a thread pick-up lip extending forwardly from a point behind the mouth under the thread and having an opening therein aligned with the tube through which air can pass into said mouth.

3. In a pneumatic thread remover for a thread remaining on the lay of a loom incident to a weft replenishing operation of the loom, a body of deformable pile material on the lay across which the thread extends, a pneumatic thread remover tube in which subatmospheric pressures exist formed with a thread intake mouth, and a thread pick-up lip on the tube extending from a point behind said mouth to a point in front thereof under said mouth and having an opening therein aligned vertically with said mouth, said lip extending into said pile material and effective due to rearward motion of the lay to deflect the piles of said material forwardly relatively to the lay to provide an open space under said opening from which air can move upwardly through said opening into said mouth.

, 4. In a pneumatic thread remover for a thread remaining incident to a weft replenishing operation of a loom, a pneumatic tube in which subatmospheric pressure exist, and a J-shaped thread pick-up lip on the tube having spaced sides between which is an opening aligned with the tube through which air moves into the tube due to said subatmospheric pressures.

5. In a pneumatic thread remover for a thread remaining incident to a weft replenishing operation of a loom, a pneumatic tube in which subatmospheric pressures exist having a thread intake mouth therein, and thread pick-up means on the tube having a side member at each side of the mouth extending forwardly from a point rearward of the mouth under the thread, said pick-up means having an opening between said members aligned with and under said mouth through which air is drawn upwardly into said mouth.

6. In a pneumatic thread remover for a thread remaining incident to a weft replenishing operation of a loom, a pneumatic tube in which subatrnospheric pressures exist having a thread receiving mouth therein, and a thread pick-up lip on the tube extending under the mouth and having an air passage therethrough below said mouth.

7. In a pneumatic thread remover for a thread remaining incident to a weft replenishing operation of a loom, a pneumatic tube in which subatmospheric pressures exist having a thread receiving mouth therein, and a thread pick-up lip on the tube lying in a plane extending across the axis of the tube under the mouth and having a plurality of air passages therein below said mouth.

GEORGE N. PETERSON.

No references cited. 

